e1 link

    framing

    1 256s-16 frames per multiframe, crc-4 option disabled

    2 256n-2 frames per multiframe, crc-4 option disabled

    3 16 frames per multiframe, crc-4 option enabled

    bit rate

    2.048 mbps ±100 ppm

    line code

    hdb3

    line impedance

    1 balanced interface-120ω

    2 unbalanced interface-75ω

    signal levels

    receive level:

    1 with ltu-0 to-33db

    2 without ltu-0 to-10db

    transmit level:

    1 balanced interface－±3v±10%

    2 unbalanced interface－±2.37v±10%

    jitter performance

    as per itu rec. g.823

    connector

    1 balanced interface-15-pin, d-type, female connector

    2 unbalanced interface-two bnc coaxial connectors

    transmit timing

    user-selectable:

    1 internal－±32 ppm oscillator

    2 external timing-locked to the transmit clock of a selected synchronous channel

    3 loopback timing-locked to the recovered receive clock

    user data channel interface

    1 v.35

    2 x.21

    3 rs-530

    4 v.36/rs-449/422 supported by means of interface adapter cables

    connectors

    1 v.35 interface-34-pin, female

    2 x.21 interface-15-pin, d-type female

    3 rs-530 interface-25-pin, d-type female

    4 v.36/rs-449/442 interface-37-pin,d-type male (via adapter cable)

    bit rates

    n×64 kbps, where n equals 1, 2, 3, ...., 31.

    clock modes

    1 dce-receive and transmit clock to the synchronous dte

    2 dte1-receive clock to the synchronous device, and transmit clock from the synchronous device (v.35 and rs-530 versions only)

    3 dte2-receive and transmit clock from the synchronous dcf

    control signals

    v.35 version:

    1 cts follows rts or constantly on,user-selectable

    2 dsr constantly on, unless in test mode

    3 dcd constantly on, unless in link sync-loss or ais condition

    x.21 version:

    1 c (control)line

    2 i (indication) line, constantly on, unless in link sync-loss or ais condition

    3 sequential timeslots (bundled)

    4 user-defined

    diagnostics

    test loops

    1 main link local analog loopback

    2 data channel remote digital loopback

    3 main link local digital loopback

    4 main link remote analog loopback

    5 main link remote digital loopback

    6 data channel local digital loopback

    ber testing

    built-in bert

    statistics

    1 bpv (bipolar violation) counter

    2 crc-4 errors counter

    3 oos counter

    supervisory port

    function

    full control over fcd-2 operation, remote monitoring and remote data collection

    interface

    rs-232

    connector

    9-pin db-9 female

    data rates

    0.3, 1.2, 2.4, 4.8, 9.6 kbps with autobaud supported

    data word format

    1 8 bit, no parity

    2 7 or 8 bit, odd parity

    3 7 or 8 bit, even parity

    dial-in capabilities

    supports all the supervisory port functions

    front panel controls

    liquid crystal display

    2 rows of 16 characters

    push buttons

    cursor, scroll, enter

    indicators

    general

    test (red)-on when a test is active

    sync loss

    loc (red)-on when the local fcd-2 hoses synchronization

    rem (red)-on when the remote fcd-2 loses synchronization

    channel

    rts (yellow)-on when an rts signal is detected on the data channel

    dcd (yellow)-on when a dcd signal is detected on the data channel

    td (yellow)-on when data is transmitted on the data channel

    rd (yellow)-on when data is received on the data channel

    alarms

    alarm indications

    link loss of signal

    bpv error

    link driver failure

    link frame slip

    invalid clock source

    alarm indication signal (als)

    alarm buffer size

    100 alarms

    installation kit(for 19" rack)

    rm-3/new

    physical

    height

    43.2 mm/1.7in(1u)

    width

    267 mm/10.5 in

    depth

    305 mm/12in

    weight

    1.3kg/2.9 lb

    power

    ac source

    100-115 or 230 vac±10%, 47 to 63 hz

    power consumption

    15w

    dc source

    -48 vdc

    environment

    temperature

    0 to 50℃(32 to 122℉)

    humidity

    up to 90%, non-condensing